Improvement in shears for sheet and plate metal



. T. BERRI'DGE,

sumas Fon SHEET AND PLATE-METAL. No. 170,658.` Patented Dec. 7,1875.

UNITED STATES PATENT OEETCE.

TEoMAs BEEEIDGE, oF sTUEGIs, MICHIGAN.

IMPRCVEMENT IN SHEARS FOR SHEET AND PLATE METAL.

Specification forming part of Letters Patent No. 170,658, dated December7, 1875 ;V application led october 11, 1875.

To all 'whom it may concern: Be it known that I, THOMAS BUREIDGE, ofSturgis, St. Joseph county, State of Michigan,

vhave invented certain Improvements in Sheet and Plate Metal Shears orGlitters, of which the following is a specification:

The object ot' my invention is to cut or separate any plate or sheetmetal, box, pipe, cone, or cylinder, or any other form of sheet or platemetal, in any direction, Without displacement or injury to the cut edgesof such form or material; and my invention consists, mainly, in a novelcombination of a cutter having a plane or concave upper surface, act'ing` as a double-cutting shears in a suitable rectangular slot, as shownin accompanying drawing, and hereinafter more fully described.

The point C of cutter A being first inserted into the object to be cut,the handles D D are operated like those of common shears. The result is,that the cutter A, playing closely yet freely in and out of slot B,makes two cuts, forcing at the same time a strip of lelle metal operatedon through slot B at the point E,

which operation, being continued, results in separating the object cutwithout injury or displacement to the out edges thereof. lut, ter A isformed of steel or other hardened metal, and has a plane or concaveupper surface, with sharp edges and a solid point, and plays freely inslot B, which is also of steel or other hardened metal, and formed ofplane surfaces and rectangular edges, cutter A and slotB being connectedby a rivet or bolt With-

